Permutation-lock.



MICHAEL PEBRETEN, OF ALLIANCE, OHIO.

PERMUTATION-LOCK.

Specfication of Letters Patent.

Ijatented May 8, 1917.

Original application filed April 13, 1916, Serial No. 90,953. Divided and this application filed December 4,

To all 'whom it may concern:

Be it known that I, MICHAEL PERRETEN, a citizen of Switzerland, residing at Alliance, in the county of Stark and State of Ohio, have invented certain new and useful Improvements in Permutation-Iiocks; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to inake and use the same.

My invention has for its object to provide a simply constructed lock for tills and the like which can only be operated by authorized persons, the present application being a division of my allowed United States application, Serial No. 90,953, filed April 13, 1916.

In the accompanying drawings which constitute a part of this specification and in which like reference characters designate the same parts throughout the several views:

Figure 1 is a longitudinal section of the lock in use showing one of the normally applied locking devices;

Fig. 2 is a view similar to Fig. 1 showing one of the normally released devices; and,

Fig. 3 is a horizontal section of the lock.

In the drawing above briefly described, the improved lock is shown for securing a money drawer or till D within a case C, said drawer having a suitable keeper K cooperating with the lock.

IThe lock consists of a suitable casing including a front plate 1, side plates 2 extending rearwardly therefrom and a bottom plate 3 which need not extend to the rear ends of the plates 2.

Rockably mounted on a horizontal rod 4: extending between the lower edges 'of the side plates 2 are a plurality of locking levers 5 which are provided on their front ends with depending noses 6 held normally in the keeper K by coiled springs 7 rising from the rear ends of the levers and anchored to a rod 8 which extends between the rear ends of the plates 2. The several levers 5 are spaced from each other and from the casing by sleeves 9.

In advance of and above the rod 9 another rod 10 extends between the side plates 2, said rod supporting thereon release levers 11 connected at their rear ends with the front arms of the levers 5 by means of suitable links 12, the front ends of said release Serial No. 135,033.

levers being extended through vertical slots 13 in the front plate 1 and having finger buttons or keys 14 on their front ends.

Rockably mounted between their ends on the rod 10 and spaced from the levers 11 by sleeves 15 are a number of parallel levers 16 having downwardly extending locking fingers 17 on their front ends normally held from engagement with the keeper K by coiled springs 18 depending from the rear ends of said levers and anchored to a rod 19 extending between the rear ends of the side plates 2, the front ends of the levers 16 being passed through vertical slots 20 in the plate 1 and having keys or finger buttons 21 arranged with the keys 14 and of the same formation.

From the foregoing, it will be evident that it is necessary to depress the two keys 14 in order to open the drawer D and that even though these keys be depressed, the drawer cannot open if one of the keys 21 is operated since the latter will rock one of the levers 16 to force its finger 17 into the keeper K. None but authorized persons therefore are permitted to open the drawer and in order to prevent observers from readily determining which keys are depressed, a guard 22 is preferably employed.

From the foregoing, taken in connection with the accompanying drawing, it will be obvious that although the invention is of simple and inexpensive nature, it will be highly efficient. For these reasons, the construction shown constitutes the preferred form of the lock but it is to be understood that within the scope of the invention as claimed, numerous changes may be made without sacrificing the principal advantages.

I claim A permutation lock comprising a casing having in its front side a plurality of vertical slots, a bottom plate for said casing, a horizontal rod extending across said casing parallel with said front side, a plurality of spaced horizontal locking levers fulcrumed between their ends on said rod and resting at their front ends on said bottom plate, said ends having integral locking noses depending below said plate, a second nod extending across the casing above the rear ends of said levers, springs connecting said rear ends and said second rod for yieldably holding the locking levers in operative position, a third rod above the front ends of said levers, a plurality of release levers fulcruned between their ends on said third rod and projecting at their front ends through certain of the aforesaid slots, links connecting the rear ends of said release levers with the front ends of said looking levers, a third series of levers fulcrumed between their encls on said third rod and extending at their front ends through the other slots, a fourth rod below the rear ends of said third series of levers, springs connecting said rear ends and fourth rod, and

integral locking fingers depending from the front ends of said third series of levers and having their lowerflends disposed in a plane 15 above that in which the lower ends of theaforesaid locking noses are located.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses. i

MICHAEL PERRETEN.

Witnesses:

SYDNEY L. GEIGER, ELEANOR C. Pon.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, ID. O. 

